DL-Methionine Manufacturer

• 

Melting Point and Thermal Stability of DL-Methionine
Melting characteristics: DL-methionine has aclear and fixed melting pointof281–283 °C(decomposition). During heating, the crystals melt into a transparent liquid, and then decompose with the release of a small amount of methyl mercaptan (CH3SH) gas (with a characteristic pungent odor) when the temperature exceeds the melting point. It is worth noting that the melting point of DL-methionine is higher than that of L-methionine (280 °C) and D-methionine (279 °C), which is due to the denser crystal lattice formed by the racemic mixture of two enantiomers, resulting in stronger intermolecular forces.
Thermal stability: DL-methionine has good thermal stability at temperatures below 100 °C. It will not decompose when heated at 80 °C for a short time (e.g., during drying), which meets the requirements of industrial processing such as granulation and tableting. However, prolonged heating above 200 °C will cause the cleavage of the C-S bond in the side chain, producing volatile sulfur-containing compounds and reducing the purity of the product.
Storage stability: DL-methionine should be stored in a sealed, cool, and dry warehouse. It is stable when isolated from moisture and high temperature, with a shelf life of more than 2 years. However, it will undergo slow oxidation when exposed to humid air and oxygen for a long time, with the sulfur atom in the side chain being oxidized to a sulfoxide group, forming DL-methionine sulfoxide, which reduces its biological activity.

Other supplier products

	N-Acetyl-L-Cysteine Manufacturer	N-Acetyl-L-Cysteine is a derivative of the amino acid L-cysteine and serves as a precursor to glutathione, a powerful antioxidant. NAC has a wide r...
	L-Lysine monohydrochloride Manufacturer	Melting Point and Thermal Properties of L-Lysine monohydrochloride Melting point (decomposition point): 263–264 °C (dec.). L-lysine mono...
	L-Threonine Purchase price	As an amphoteric compound, L-threonine can buffer pH changes in acidic or alkaline food systems: Used in beverages (e.g., sports drinks, fruit juic...
	DL-methionine powder Supplier	As a racemic mixture, DL-methionine exhibits different biological activities compared to its individual enantiomers:In animal organisms, only L-met...
	L-proline Manufacturer	The uses of L-prolineIn the field of medicine: In the pharmaceutical industry, L-proline can be used as a raw material for amino acid infusions, an...

Same products

	L-Lysine monohydrochloride as nutrient additives	Seller: Shanghai Yifu Food Ingredients Co., Ltd	Free L-lysine is highly hygroscopic—it absorbs atmospheric moisture rapidly at relative hum...
	L-Lysine monohydrochloride Purchase price	Seller: Shanghai Yifu Food Ingredients Co., Ltd	L-Lysine monohydrochloridehas a higher aqueous solubility than free L-lysine: ~70 g/100 mL at 25 ...
	L-Lysine monohydrochloride Partners, long-termCooperation	Seller: Shanghai Yifu Food Ingredients Co., Ltd	The most prominent performance advantage ofL-Lysine monohydrochloride is its optimized physical a...
	L-Lysine monohydrochloride Marke quotation	Seller: Shanghai Yifu Food Ingredients Co., Ltd	L-Lysine monohydrochloride (L-Lys·HCl) is the dominant commercial form of L-lysine—a...
	L-lysine monohydrochloride Supply price	Seller: Shanghai Yifu Food Ingredients Co., Ltd	L-lysine monohydrochloride’s unique physical and chemical properties make it the preferred ...